Commissioning Manager – Mechanical Bias Central London | Site-Based | Contract or Permanent An established M&E contractor is seeking an experienced Commissioning Manager (Mechanical Bias) to take ownership of the commissioning and close-out phase on a large, high-profile commercial development in central London. This role suits a mechanically focused commissioning professional who can drive the testing, witnessing, and handover process to the highest standards — not just monitor it. You’ll be based within the site office compound but will spend regular time on site ensuring systems are complete, ready for testing, and fully compliant. Key Responsibilities * Lead and coordinate the commissioning and close-out phase of mechanical and building services systems. * Manage and oversee testing, witnessing, and verification of systems to ensure quality and compliance. * Take a proactive, hands-on approach to driving commissioning progress and resolving any issues on site. * Ensure all QA documentation, test records, and handover packs are produced to the highest standard. * Liaise effectively with consultants, subcontractors, and the client team to maintain programme and quality objectives. * Verify that all systems are fully commissioned, witnessed, and accepted before project completion. Requirements * Proven mechanical commissioning experience on large-scale commercial or mixed-use projects. * Strong understanding of mechanical building services systems (HVAC, chilled water, heating, ventilation, pumps, and controls). * Demonstrable ability to manage commissioning paperwork, QA packs, and close-out documentation. * Excellent communication and coordination skills across multiple project stakeholders. * Highly organised, with a detail-driven approach and a commitment to delivery excellence. Package * Site-based role in Central London * Contract or permanent opportunity available * Competitive day rate or salary depending on experience